Apparatus for drawing glass sheets.



:NQ. azmgg. PATENTED MAY 29, 1906.

J. H. LUBBERS. I APPARATUS FOR DRAWING GLASS SHEETS.

APPLIOATION FILED AUG. 12, 1904.

5 S TS--SHEET l.

NVENTOR No. 821,724. PATENTED MAY 29, 1995,

APPARATUS FOR BBAWING GLASS SHEETS.

' APILIOATION TILED A174 1.2 1904- 5 SHEETSSHEBT 2 6 m 0 9 m 1 H 4 9 y Y E A m M H mm "D 7 E m B m E P WAN NJ\ 2 Wm HUI S I RGm ENA BI w W m I LR 5mm $0M FLU Q mm A A R QM A P. P A

No. 821,724 PATENTED MAY 29, 1906; J. H. LUBBERS.

APPARATUS FOR DRAWING GLASS SHEETS 8 APPLICATION FILED AUG. 12, 1904 LUBBERS,

OF ALLEGHENY, FENNSYLVANKA, AbiSlGNOR'lU W GLASS ll iAQHlNE CQMPANY, OF PITTSEURG, PENNSYL- JGKPOHATEON NEW JERSEY .it'atonted may 29, 1906..

U Application filed August 12,1904. Serial No. 220,485.

1'0 wi l whom 27;? ind-g3; concern:

irlc it known that ii, Jenn H. IJUBBERS, of l deny, i ii eghcn county, Pennsylvania, invented a new and useful Apparatus ll'rawing Glass llSCtS, of which the fola l, clear, and exact description, ence had to the accompanying s, homing part oi this specilication,

, re 1 is a vertical lmgitudinal section cred d; ring apparatus. Fig. 2 sees-canon n the line ii 11 of osssection on 4 is an erid end. of the ana sectional plan 'ng on the line i V of Fig. paint-as on lar er i is a plan View oi the pan from which the sheets are drawn; and Figs. 7 and F are vertical sections on the lines V11 VII and Will VH1, respectively, of Fig. 6.

The present application. is in part a division of my application, iicrial No.

lilod January 12, 1903.

in present apparatus, which is adapted for drawing a mum ber of glass sheets at one opcratio'n, I provide a new mechanism for burning oil the glass sheets-that is to say, separating them from. the lass which remains in the pan at the end of he drawing operation. This device without disturbing the sheets which have been drawn shields them from the heat which is applied at the top of the pan for l" irnirig or melting on the lower ends of the sheet and confines the flame, so that it cannot pass up along; the drawn sheets and warp them. also provide means by which icat which is employed for heating the pan. is discharged into the hollow walls of the drawingwliamher, heating these Walls, and thus applying heat to the edges of the glass sheets, and i employ burners by which direct heat can be applied to the hollow walls; l also provide means by which the baits on which the glass sheets are drawn are carried 'tln'ong li the anncaling chamber and are/returned to the drawirig-chamber. My new device enables inc to draw a much greater nuinber oi shecls at a time than. has been hcretoi pd do. l also provide means by which the hot air in the annealing-chainbcr drawn downwerdly and thence prefer ably through the hollow walls of the annealing-chamber. This equali'zes the temperature and (prevents overheating of the upper ends of the glass sheets next to the bait, which is apt to cause breakage of the sheets when they are drawn out of the annealing-charm her. I also construct the annealing-chamher with a large space below the end glass sheet, so that in the event of breakage the broken pieces of glass can fall to the bottom of this space and will therefore not inter fore with the operation of annealing or come into contact with the other glass sheets during their passage through the leer. The enlarged space at the bottom of the leer equaflthe temperature of the upper part of the lccr in which the lass sheets pass, for the cold. air will natura ly seek the lowest part'oi the chamber, which in my apparatus is so far below the lower end of the glass sheets that the cold air cannot injuriously affect them: This cold air is carried away throu 11 ports in the bottom of the annealing-chain er, being displaced by hot air drawn from above. i-

am enabled by these devices to accomplish the annealing effectively in a shorter cha1nher than heretofore. 3

My invention also com rises an improved construction of the cover by which the pan is covered durin the time when the residual glass from the ast drawing 0 eration is being reheated and poured out an during the time when a tresh charge of glass is being flowed from the tank into the pan.

My invention also relates to other novel features, which I will describe and claim.

, In the drawings, 2 represents the end of a tank in which the glass is melted and fromwbich it is flowed through ail-opening controlled by a refractory block 3 and,a trough 4 into the drawing-pan 5, which is preferably supported tipon refracto posts 6 7, movable vertically within. gui cs 8 in the bottom of the pan-chamber and adapted to be lifted by frames 9 9, which enga e their lower ends and are raised and lowered y chains 10, assing around pulleys 11 on shafts 12, an are operated by ratchetdevers 13, the shafts being preferably counterbalanced by weights may be raised and lowered in riglitlines, preserving; its level position, and by keeping the of the too ' the dew-ted i 'vlded is qiose 1 glevafisfi and iowering only $111 fmm Q P mn 111a be iipped sidewise, as s -ov my ci s'i ued-iimzs in Fig. Ti, s as to pour its r due of into an inclined tron h whence it W11 be discharged outside nace shruc tule.

16 is the drawing-(chamber containing: verflea eievatmi-slkles 17 for the eift 18, which marries the cars with. file bait-holders, by which mm glass is dzawn from the am. This lift is raised and lawered veriziml y by suii abls Tnediumism, preferably by chains or mp0s 1.9, which pass over pulleys 2G, and wound by a drum 21, cpemted by any suitable moto z' device.

The-61M cm"- ries a series of baib-haiders each adapted, 'pii'efem-bly to receive a 3.111111061 of Wire nails N or like devices and by means of the bai'zs so canstiw'ied m dime a piuxality 0i sheets S 9/27 0" i 'mbtvian.

ywhish place there are vs; cal s21 1 1 lift 29, so 'ijhfih mav be raied and tz'mnsior'red to the TQfiUTDr-tTfi-CK 30, by which they 1. 7 be carried in 512 S5011; to the Crmsving-sbamber 1.. there (19 1' 5; hey are raquirea upon 1, 1 .[L damp J; 3} is p21 as: opening from the dimmingchmnboz after the ar has been mishead hi0 thelii't. The1ifti2 is operated Patch a; shaft 32 @2116 rope 2S3, Whisk shaf also} 3* a, TOPQ S4 simu'immvo';1sly operates the damper 31. The lows/1* (2211RP61' pl'efqmiz-iy'upemtsd by a separate mp9 35.

THe vars me nunnxi on my. truck 6, pzeii'embly by 8, Wind 'mft 36 zmd a:

P mm.

This mum 2 at dz'iivuy and operate hy aims passing; OWI' puiiuys 24. '1 .fimnealingp ch21 mher is mei'm'zzbiy made of cmzsidemuiy gm m! E '1 t 'thzm height of the, glass shuts Whieh m drawn, so as to provide below the sh, R a large 0pm spasm (Shown. in Fig. i.) om Hm bottom of this spam ports; i 211% inw ivlw'spm' m the hollow 5.5414 Fm-$401 ii-in :mnm1ing-chanflmr, having dam, m''nnivd opnnir 11$ Hm-tnp xa'hivh m in. riusi i 'pmxl' m aimguthei', as (ham '1? hollow (1513 of who am Mug-- sir-(w? u chnmbm' an 21M) hvuimi by 5m 39,

damper (shown 3,) 212 annesiingmhambr 31."?

by the heat radiated ting thus k013i hm, i'mm the giass sheets and by filmishad by the burners in ix 9 hollow waiL thus Email I the Willis the edges of the shes am the swabs in contract fun being partly epen at dampers, and commum- )m thmugh fines 1G with the 338,11 5,

umers not 0115 hemfin pan, but salsa by 1 40 into the heiie'w side-avails the 5111s keying he i Whik: 5 h .633 thus 1:01

ramvingmhamt mmm v run 11 on 3,

01 2 Mi t pzxiied e3 Ii Wbii-a one is pusha tnrmvdmte smces between which gielss sl zeefis can hedz'awn When 1 1s dafilrem'; to burn 0f? the glass shits thnir lower and? :1'1'0111 the :Qsidue 01 glass m the pan, the hand vm i am turn the bars 4-5, SQ mat film's @rgm which positifin they afferii wide in-- same.

rection, thus narrowing the open hpaees bef tween the lass sheets] and confinin the heme which 18 applied-below them, set at it will not ass up along the sheets and warp the he amount of water flowing throu h these bars'may be regulated according tot e chillwhich is necessary in drawing the sheets of different thickness. in performing the operation of'burning off the pan 5 is lowered,

seas to bring i'ts surface below the upper row of burners 41, the water cooled bars 45 are then turned into their horizontal position, and a strong flame is direpted from the burners 41 into the sur'fac erofthe pan, which will rapidly melt off the (glass connecting the sheetswith the pan an will leave the sheets free to be lifted by raisin-gthe lift 18 into position for transierrin the car from the drawi i chamber into the annealing chamber. W ien the sheets have thus been'burned off, the water-cooled shield is drawn up suffici entl y to allow the cover to be moved over the pan, and when the pan has thus been covered it is heated sufficiently to melt the residue of glass into averyliquid condition. It is then tilted sidewise to discharge the glass, or as much of it as may be desired, into the trough.

15, and it is then raised into horizontal position beneath the trough 4 to receive a fresh supply of glass from the tank.

The water-cooled shieldeframc is provided with flexible pipe connections 53 and is supported by a liftingdevice which may consist of ropes or chains 52, (shown in Fig. 2,) by

avhich it may be raised and lowered as desired. when covering or removing the cover from the-top. l

in the figures on the fifthsheet of the drawings I show a construction of the pan from which the glass is drawn which is of great practical importance. This pan instead of having vertical straight inner sides is provided with inward projections or ribs 54, which are beveled, terminating, preferably, to a point, 3.1K are also preferably inclined. The glass sheets are drawn in lines extending between the apexes of the opposite projection, and the glass film adheres thereto, being held out thereby, so that the tendency of the sheet to contract at the lower end is countcracted, and the edges of the glass sheet being held out from the sides of the pan are kept in the hotter body of glass and are thus prevented from thickening, as they otherwise have a tendency to do. I prefer also to make the pan deeper at its middle than at its ends,

shown.

By providing the carrier with a groupof g1ass-drawing baits arranged to be operated in a unit, as above described to s'imultane onely draw a plurality of sheets I obtain the very important advantage of causing the outer sheets to protect the inner ones from of single sheets upwardly within a drawing atmosphere that many of the sheets would plurality of parallel sheets the outer sheets act as shields for the inner ones and the warp ing tendency is very largely overcome erreduced.

Within the scope of the invention as defined in the claims those skilled in the art will'be able to modify the device in various ways and to use some of the elements and combinations above described without the others, since What I claim is v 1. Apparatus for drawing glass sheets,

comprising a carrierhavi'ng connected thereto a group of glass-drawing baitsadapted to be raised from the glass and to be drawn from the chamber as a unit whereby the outer sheets of'the group of drawn sheets protect the inner ones from warping; substantially as described.

l .2. Glass-drawing apparatus comprising a car carrying a group of baits, and means by which t e car is raised from the glass and transferred to an annealii'ig-chamber with the glass plates or sheets suspended in ad-- jacent parallel planes, flatwisc of the cham ber substantially as described.

3. Glass-drawing apparatus comprising a drawing-chamber, an annealing-chamber,

into the annealing-chamber, and a returntrack leading to the drawing-chamber; substantially as described.

4. Glass-drawing apparatus comprising a drawingchamber, an annealingchamber, tracks leading from the drawing-chamber to the annealing-chamber, and cars carrying groups of baits the parts being arranged to carry the groups of drawn plates or sheets suspended in adjlacent parallel planes flatwise through thd annealing-chamber; substantially as described.

5. vllass-drawing apparatus comprising a drawing-chamber and an annealing-cl1amher through which the glass sheets are can ried flatwisc in'adjaccnt parallel planes, said annealing-chamber having a deep space be low the glass sheet;'substantially as described. Y I a v 6. Glass-drawing apparatus'comprisingan suspended. glass sheets through the anneah ing-chanibcr and .Qoutlet-iiucs: leading from the lower end the chamber; substantially as described. i

7. Glass-drawin apparatuscomprising an aiinerli g-charnbei through which the glass sheets are car led in series in vertical position, hollow wallsgandfiues leading from the base of the chamber intothe hollow walls; substantially as described; 4 8. Glass-drawing apparatus having means annealing-chamber mechanism for carryung for drawing glass sheets. and shield members warp during the drawing. By drawing a g tracks leading from the'drawing-chan'iber l terposed between the glass sheets and edepti 40 :1 number of inward projections separated nosed between the sheets, and means by wlnen the open spaees between the sheets are narrowed without moving the sheets; substantially as described. l

Glessdrewiug apparatus having means r for drawing glass sheets, and nieens by which the open species between the sheets are nar' rowed without moving the sheets substantially as described.

10. Glass-dmwi11g apparatus heving means for drawing glass sheets shield members ined to he turned to narrow the space between the sheets; substantially as described.

11. Glassdmtving apparatus having means for drawing glass sheets shieldineinhers interposed between the glass sheets and adapt ed to be turned to narrow the between 1 the sheets, mid means for supplying heat to the glass below the shield tor the purpose ol" hurningof'l the sheets from the residual glass substantially described.

12. A shield comprising a. series of watercooled hers oblong in cross section, and means for rotating the bars substantially as cleseri bed.

13. A, shield oon'iprising a series of Watercooled hers oblong in cross-section, means for rotating the bars, and means for raising and lowering the shield; substantially desi-rihed.

14.. Gless-(lrznving amiarzrtus eoi'nprising a l drswine-ehmnher, an upwerdly-movehlelift, vars adapted to he carried by the hit, an enuealingmhainber into which the cars are transferred from the lift, and means tor returning the cars; substantially as described.

15. in es-drawing; apparatus, e drewing-pen having opposite Wells provided. with hf) intermediate spaces or recesses; substantially described.

as described.

18. In glass-drawing apparatus, adrewin pan deeper underneath the center portion of the article being drmvzrthan at the end port-ions thereof suhstentiall as described.

1.9. In glass-drawing apparatus, 2. receptsele or receptacles foe molten glass, 2 common drawingchamber above the smile, and niechenisn'i for simultaneously drawing a, plurality of sheets upwardly within the draw lug-chamber, whereby the outer sheets proteet the inner sheets from Warping; substantifiliy as described.

2G. in glass-drawing apparatus, a drmv ing-ehmnher within which the sheets are drawn and having an inelosed atmosphere, and drawii'ig mechanism arranged to simulteneously drew a. series of sheets upwardly Within the ehemher whereby the outer sheets protect the inner ones from Warp ng; sul

stentielly described.

In testunony whereof I have hereunto set my hand. v

JOHN H. LUBBERS. Witnesses:

THOMAS W. BAKE-WELL, GEO. B. BLmnN-d.

in glass-die vihg apparatus, a draw ermediate spaces 01 rehesses; substantially 

